Wouldn’t this be pretty bang-on expected for less premium groceries where profit margins are much thinner?
For example, a food product retailing at £2 where £1.80 covers farming costs and operational costs, inflation of 10% will increase those costs to £1.98, to keep a 20p profit, the retailer would increase the price to £2.18 (9% increase). A more premium food product that retails for £3.50 where the farming costs are only slightly higher might have a £2 cost for the retailer with a much higher markup of £1.50. To keep that same profit after 10% cost inflation (to £2.20), the price would rise to £3.70 (5.7% increase).